Nabal also said about Esau, the wicked one who speaks one thing with his mouth and another in his heart, that in his heart he said (Genesis 27:41), "Behold, now I am old, I know not the day of my death." But with his mouth, he said (Genesis 27:1), "Behold, I am here." The Lord said to him, "You are a wicked man, you flatter your father with your words," as it is said (Genesis 27:34), "Bless me, even me also, O my father."
This is what the scripture means when it says (Proverbs 26:25), "When he speaketh fair, believe him not, for there are seven abominations in his heart." Everything that I hate, he loves, as it is said (Proverbs 6:16-19), "These six things doth the Lord hate: yea, seven are an abomination unto him." Another thing that Nabal said in his heart was that the Lord said to the wicked, "You think in your heart, so I will not punish you, but the sword shall enter into your heart," as it is said (Psalm 37:15), "Their sword shall enter into their own heart."